4 ms·

What's being tested here has nothing to do with Spectre. Only KPTI.

• bitL 9y ago
  Maybe a better formulated question would be - do the Meltdown changes to kernel impose performance penalty on AMD processors as well (regardless of exploitability)?
  • paulmd 9y ago
    They are not enabled for AMD by default. If you force them to be enabled, they impact performance (of course).
    • jnordwick 9y ago
      Even on Intel there should be an evaluation of performance cost vs risk. If you are not running unknown code, you may not want to enable kpti either.
      • paulmd 9y ago
        Extremely correct. Database and frontend servers are hit pretty hard, nothing in the middle is hit. But neither of those ends is actually running untrusted code, for the most part. I predict a decline of the "hyperconvergence" server and a return of the usual "database server" + "app server" + "frontend server" combo.
• voidlogic 9y ago
  Thanks, I understand now. What I didn't realize is that KPTI is only related to Meltdown mitigation. Thanks.